Add mousewheel support for SDL
Additional default resolutions for SDL
Additional resolutions for Windows
Toggle mouse grab with ctrl-g in SDL

This shortcut is used in many SDL/Linux games (including the
classic Loki games).
Merge branch 'improve-linux-input' of git://github.com/DanielGibson/jfbuild
joystick improvements

Dead/saturation zones are done in the JMACT code now.
statically link libgcc and libstdc++ on Windows

Seems mingw prefers a DLL form of them these days.
joystick hats were not being initialised to a centre position
better handling of app/support/home/etc directories
expose the aspect ratios and wide/tallscreen values to games
Return executable's directory in Bgetappdir() on Linux/BSD

In case you don't have the .grp file in one of the hardcoded paths (e.g.
/usr/share/games/jfsw) or in ~/.jfsw (or Duke equivalent), but in the
same directory as the executable